This is a Casey Jones mask I designed. There are 3 slots for straps. I made two versions. One version has a smooth texture and the other has a ruff texture.
It's height is 196 mm and width is 181 mm. It should fit a 24 inch head.
I design props and costumes mostly. I am not an engineer nor a trained artist. I learned almost everything from watching Youtube videos and just messing around in designing software. I started designing with Fusion 360 in August 2016.